A Massachusetts sublease agreement is a document that legally allows the original tenant of a rented property to lease it to a new tenant. However, most leases require landlord written consent before subleasing can occur, as noted in Massachusetts Legal Help guidelines.Create your Massachusetts sublease agreement to rent your unit. Use our free template to sublet to a new tenant. Edit, sign, and share Commercial Sublease - Massachusetts online. No need to install software, just go to DocHub, and sign up instantly and for free. A commercial lease agreement outlines the terms conditions and obligations of maintaining and renting the business space. A commercial sublease agreement is a statutory document authorizing a third party to occupy a leased property under the original lease agreement.